I'm going to try and shorten this yet still give the full story.

A year or so ago I had a major falling out with my SIL and MIL. Over the course of 5 or so years I watched my SIL decline using alcohol to cope with the PPD she was experiencing. She suffered from post partum anxiety as well, was over paranoid about everything. She had a hard time adjusting to being a SAHM since she went from being a social butterfly to 100% her kid 100% of the time. (We all know as parents how difficult that transition can be and how important it is to remember to take care of yourself.) I didn't notice her drinking was too much of a problem until she had her 2nd kid. She admitted to me that she and her friend drank a whole bottle of wine between the two of them while she was pregnant (if I recall correctly she was about 6 or 7 months pregnant.) That was concerning but not my business so I didn't say anything and didnt want to cause an issue. Well then we decide to live under the same roof(worst mistake ever, we lived downstairs they lived upstairs with our own entrances) she would try and control when/where we would watch TV we couldn't watch TV in our room because it would wake up the baby. We couldn't watch TV too late because it would wake up the baby, we couldn't vacuum because it would wake up the baby. She had zero respect for our privacy, she'd come use the laundry room whenever she'd like, if I had laundry in she would take it out, she even started to open up our mail. When we would confront her she would freak out and blow things way out of proportion. I would over hear her talking badly about me to her friends on the phone, i let things go thinking she was just being crazy hormonal and it'll get better once the baby is here.

Well then she goes into labor, and instead of waking us up to watch our niece (mind you we lived downstairs) she had our neighbor come over. This was a punch in the face but whatever, well she didn't even tell us that she had the baby we had to find out from my MIL and then she didnt even invite us to come meet our new niece at the hospital. This was all very hurtful but we let it go, we just wanted our child to have a relationship with his cousins and everyone to be at least cordial. We moved out, and were trying to forgive and forget, trying to build a better relationship. Well they were moving so my MIL came into town to help them move and they stayed at our house before getting on the road. My SIL got black out drunk, was saying some weird shit about how her brother is the love of her life, then threw up all over my bathroom and passed out. She couldn't even hear her newborn baby crying, so her mom held her baby up to her boob to get her to stop crying....ok woah not cool.

Ugh sorry this is so long. I'm trying not to be so wordy.

Ok fast forward a couple other concerning incidents have happened, her daughter almost got hit by a car, she was drunk walking down a fairly busy street not holding her daughters hand, her daughter bolted out into the middle of the road but luckily didnt get hit. Then she's drunk at a brewery and her daughter asked me to take her to the bathroom so I did when I came back my SIL was in full panic mode because she thought she lost her daughter.

Straw that broken the camels back she accuses me of sexually assaulting her daughter because "people who get molested become molesters" so I called CPS on her, and explained to them how I think she's using alcohol irresponsibly to cope with her PPD. I think she is struggling with her mental health and needs some help. Welp of course she's the victim and I'm a horrible person she turns everyone in her family against me and we haven't spoken to his family in over a year. Not once did they try and hear our side of the story they just immediately drew a line in the sand and that's that.

Well I was thinking about writing a letter since we've given it some time to mellow out. The letter would contain maybe just how its time to put the past behind us and move on and that i forgive her and so forth and so on. What do yall think?